Modal parameter identification and vibration based damage detection of a multiple cracked cantilever beam

被引：80

作者：

Altunisik, Ahmet Can ^{[1
]}

Okur, Fatih Yesevi ^{[1
]}

Kahya, Volkan ^{[1
]}

机构：

[1] Karadeniz Tech Univ, Dept Civil Engn, TR-61080 Trabzon, Turkey

来源：

ENGINEERING FAILURE ANALYSIS | 2017年 / 79卷

关键词：

Ambient vibration test; Automated model updating; Cracked beam; Damage detection; Finite element method; REINFORCED-CONCRETE BEAMS; LOCATION; BEHAVIOR;

D O I：

10.1016/j.engfailanal.2017.04.026

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper presents a detailed investigation on the modal parameter identification and vibration based damage detection of a multiple cracked cantilever beam with hollow circular cross-section. To consider multiple crack effects, a cantilever beam including cracks is considered for six damage scenarios. Finite element models are constituted in ANSYS software for numerical solutions. The results are validated by experimental measurements. Ambient vibration tests are performed to extract the dynamic characteristics using Enhanced Frequency Domain Decomposition (EFDD) and Stochastic Subspace Identification (SSI) methods. Calculated and measured natural frequencies and mode shapes for undamaged and damaged beams are compared with each other. Automated model updating is carried out using the modal sensitivity method based on Bayesian parameter estimation to minimize the differences for damage detection. In addition, modal assurance criterion (MAC) and coordinated modal assurance criterion (COMAC) factors are obtained from the mode shapes and two set of measurements to establish the correlation between the measured and calculated values for damage location identification.

引用

页码：154 / 170

页数：17

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